and the obama administration the going to be able to maintain for very long. >> warner: mark mazzetti, thank you for joining us and i look forward to continuing our conversation about "the way of the knife" online. >> thanks very much. >> ifill: as margaret said, there is more of their conversation online, and you can find that on the rundown. >> woodruff: finally tonight, america's retirement system and the growing problems it poses for future generations. that's the subject of tonight's frontline, "the retirement gamble." correspondent martin smith looks at what was behind the shift to private plans known as 401(k)'s, the role of the financial services industry, and why too many americans have too little in savings. here's an excerpt about the plight of one worker and what he is facing. >> robert tilton smith entered the work force in 2003. he taught far bit, worked at a coffee shop and then went to grad school where he ran up $40,000 in student loans. but on the bright side, he had no savings to lose during the 2008 crash. when he graduated with a master niece economics he was hire